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<html lang="zh-CN">
  <head>
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  <body>
    <div class="container">
        <div style="margin-bottom:50px">
          <img src="images/ad2.png" class="center-block" >
        </div>
            <form class="form-signin" >
              <label for="inputEmail" class="sr-only" >用户名</label>
              <input type="text" id="inputEmail" class="form-control" placeholder="用户名" required autofocus>
              
              <label for="inputPassword" class="sr-only">密码</label>
              <input style="margin-top:10px" type="password" id="inputPassword" class="form-control" placeholder="密码" required >
              <div class="checkbox">
                <label>
                  <input type="checkbox" value="remember-me"> 记住用户名
                </label>
              </div>
              <button class="btn btn-lg btn-primary btn-block" type="submit" onclick="s()">登录</button>
            </form>

    </div>

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